Almost everything written about scar care assumes you are standing at the start: the wound has just closed, the scar is new, and there is a remodelling window to work with. If your scar is three years old, most of that advice does not apply, and the answer is more modest.
What has already been decided
A scar is usually considered mature after about a year. By then the body has finished most of its collagen reorganising, the redness of new blood vessel growth has faded, and the scar has settled into its shape. Its outline, its depth, and whether it is raised or depressed are largely fixed.
That is why no topical product will make an old scar disappear.
What can still change
Texture and firmness. Mature scar tissue can still soften. Occlusion and sustained moisture are the mechanism, and it is the same mechanism that works on new scars — just slower, and from a starting point that has already hardened.
Dryness and tightness. Scar tissue has fewer oil glands than the skin around it, so it stays dry and often feels tight long after it has stopped changing colour. That is directly addressable, and the improvement in comfort is often what people notice first.
Colour, to a degree. Post-inflammatory pigmentation can continue to even out over months. A scar that is paler than surrounding skin, though, has lost pigment-producing cells and will generally stay pale.
Itching and discomfort. Older raised scars that itch or catch often feel better once the surface is kept sealed and moisturised.
How long to give it
If a new scar needs weeks to show a change, an old one needs longer. Give it a full course — three months or longer, two to three times a day — before you judge it, and photograph it on day one; you will need the comparison.
If nothing has shifted after a full course, this scar needs a different tool. The next section is about which one.
Where a professional is the right next step
Some things topical care cannot do:
- Depressed or pitted scars need volume, not occlusion. Resurfacing, microneedling and fillers are the relevant options, and they are clinic procedures.
- Large, thick or painful keloids often need injected treatment, and are managed rather than removed — surgery alone can provoke a bigger keloid.
- Contracture scars limiting movement are a surgical question.
None of that is a reason to skip topical care; it often runs alongside these treatments rather than instead of them. It is a reason to get an opinion rather than spending another year hoping.
Two habits worth keeping either way
Protect the scar from sun — mature scar tissue still darkens with UV exposure, and that is one of the few ways an old scar becomes more visible. And keep it moisturised. Both are cheap, and neither has an end date.
The mechanism, and its limits, are on the how it works page.